Hearing aid part



FIG. 1 is a front view of a hearing aid part, showing our new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view thereof.

Portions of the hearing aid part shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a hearing aid part, as shown and described. 